VulnerabilityAnalyzed

CVE-2026-58403

This effectively let a symlink planted inside a theme or local mount read arbitrary files reachable to the user running hugo.

MEDIUM 5.9EPSS 0.47%

Does this matter?

Lower severity and a low EPSS score (0.47%). Track it; it rarely justifies an emergency change on its own.

Description

Hugo is a static site generator. From v0.123.0 through v0.163.0, Hugo's virtual filesystem is designed so that files under a mount cannot reach outside the mount tree, but a regression caused RootMappingFs.statRoot to call Stat, which follows symlinks, instead of Lstat, so a direct os.ReadFile "somefile" where somefile was a symlink pointing outside the mount would return the target's contents. This effectively let a symlink planted inside a theme or local mount read arbitrary files reachable to the user running hugo. This issue is fixed in v0.163.1.

CVSS 4.0: 5.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.47% probability · 40th percentile
CISA KEV: Not listed
Weakness: CWE-59
Affected: gohugo/hugo
Source: security-advisories@github.com

References

https://github.com/gohugoio/hugo/commit/cf9c8f93ca2a2838ce378f9e36d052ac2f79e229Patch
https://github.com/gohugoio/hugo/pull/15020Issue Tracking
https://github.com/gohugoio/hugo/releases/tag/v0.163.1Release Notes
https://github.com/gohugoio/hugo/security/advisories/GHSA-c3wq-j5vh-68rcVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.